I imagine he also insulated all of the switch boxes as well?
The guy probably thought the orange fire stop expanding spray foam that they sell at HD and Lowe's was just perfect for the task at hand. I'd hate to be the guy who has to clean out all those boxes... that stuff dries really hard, almost like structural spray foam... and what about dimmer switches, etc., when they start overheating.
You never know these days though. This insulation guy might end up being considered a pioneer and nominated for the next Nobel Peace Prize.